/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */
package org.apache.bcel.classfile;

import java.io.DataOutputStream;
import java.io.IOException;
import java.io.Serializable;

import org.apache.bcel.Constants;

/**
 * an annotation's element value pair
 * 
 * @version $Id: ElementValuePair
 * @author <A HREF="mailto:dbrosius@qis.net">D. Brosius</A>
 * @since 5.3
 */
public class ElementValuePair implements Serializable
{
    private static final long serialVersionUID = 4511757344153519387L;

    private ElementValue elementValue;

	private ConstantPool constantPool;

	private int elementNameIndex;

	public ElementValuePair(int elementNameIndex, ElementValue elementValue,
			ConstantPool constantPool)
	{
		this.elementValue = elementValue;
		this.elementNameIndex = elementNameIndex;
		this.constantPool = constantPool;
	}

	public String getNameString()
	{
		ConstantUtf8 c = (ConstantUtf8) constantPool.getConstant(
				elementNameIndex, Constants.CONSTANT_Utf8);
		return c.getBytes();
	}

	public final ElementValue getValue()
	{
		return elementValue;
	}

	public int getNameIndex()
	{
		return elementNameIndex;
	}

	public String toShortString()
	{
		StringBuilder result = new StringBuilder();
		result.append(getNameString()).append("=").append(
				getValue().toShortString());
		return result.toString();
	}
	
	protected void dump(DataOutputStream dos) throws IOException {
		dos.writeShort(elementNameIndex); // u2 name of the element
		elementValue.dump(dos);
	}
}
